If they have to include an existing song with lyrics, I highly recommend Jethro Tull's "Cold Wind to Valhalla." It is one of those awesome songs that few people have heard, and deserves some love, especially on a blockbuster treat such as Thor 2.

"I've known since I first took over the series that I wanted to eventually have someone else pick up the hammer," says the writer. "It's kind of a time-honored Thor tradition at this point, isn't it? Going back to the days of Beta Ray Bill."